/******************************************************************************
 * Copyright (C) 2015  671643387@qq.com
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 *****************************************************************************/

#ifndef UGAME_SYSTEM_MUTEX_WIN32_H_
#define UGAME_SYSTEM_MUTEX_WIN32_H_

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif

#define WIN32_LEAN_AND_MEAN
#include <Windows.h>

namespace UGame {
namespace System {

	class MutexImpl
	{
	public:
		MutexImpl(void) : _isLocked(false) { InitializeCriticalSectionAndSpinCount(&_mutex, 4000); }
		~MutexImpl(void) { DeleteCriticalSection(&_mutex); }

		bool LockImpl(void) { EnterCriticalSection(&_mutex); _isLocked = true; return true; }
		bool UnlockImpl(void) { _isLocked = false; LeaveCriticalSection(&_mutex); return true; }
		bool TryLockImpl(void) { 
			if (TryEnterCriticalSection(&_mutex)) { 
				_isLocked = false; 
				return true; 
			} 
			return false; 
		}
		bool IsLockedImpl(void) const { return _isLocked; }

	private:
		volatile bool _isLocked;
		CRITICAL_SECTION _mutex;
	};

}}

#endif // UGAME_SYSTEM_MUTEX_WIN32_H_
